The method of preventive disinfection of classrooms is 1 5 watts per cubic meter for how many hours

Common methods of preventive disinfection indoors include preparing food, washing hands before and after eating, and before and after wearing masks; Use disinfectant wipes to wipe and disinfect other tools before using them; Open the windows in the room frequently, and strengthen the management and other methods. If you want to better understand the common methods of preventive disinfection in the room, you can continue to read on.

1. It is recommended to wash hands under running water with hand sanitizer or soap when preparing food, going to the toilet before and after meals, and when wearing and taking off masks. Alternatively, sanitize your hands with an alcohol-based or quaternary ammonium hand sanitizer or disposable disinfectant wipes.

2. For mobile phones, ** machines, buttons, remote controls, mice and other items, they can be wiped and disinfected with disposable anti-drug wipes containing alcohol or quaternary ammonium salts.

3. In indoor rooms, bathrooms, toilets and other places, frequent ventilation is required, at least 3 times a day, more than 30 minutes each time, and windows are strengthened for ventilation.

4. Water cups or tableware and other supplies can be put into water for boiling and disinfection, and the boiling time needs to be greater than 15 minutes, or they can be put into the disinfection cabinet for disinfection.

Hello, do you want air disinfection, or floor disinfection, or wipe disinfection.

Disinfectant: containing 5% effective chlorine 6% within the validity period, generally calculated as 5%. Mix and dilute with tap water at a ratio of 1:100-200 times.

2. Euchlorine: the stability of the aqueous solution is poor, and the available chlorine content is 60% and 65% is generally calculated as 60%. Mix and dilute with tap water at a ratio of 1:1000-2000 times.

3. Bleaching tablets: the main ingredient is calcium hypochlorite, containing at least 60% of available chlorine, it should be noted that bleaching powder and bleaching powder tablets are easy to absorb water and deliquescent, and should be kept in sealed bags or glass bottles. Put 1-2 tablets in 1 liter of tap water and dissolve thoroughly.

4. Trichloroisocyanuric acid: white powder, effective chlorine content 90%. Mix and dilute with tap water at a ratio of 1:1500-3000 times.

5. Bleaching powder: the main ingredient is calcium hypochlorite, containing 25% and 32% of available chlorine, generally calculated as 25%. Unstable, easy to absorb moisture, easy to decompose when exposed to light or heat, bleaching effect on items, corrosive effect on metal.

Mix and dilute with tap water at a ratio of 1:400-800 times.

High temperature boiling, and professional disinfection lamps. In fact, boiling vinegar has been tried before at home, but once I read the newspaper and said that this method is not scientific!!

Family members have frequent contact with society, and it is easy to bring respiratory infectious disease germs into the family. Once an infectious disease occurs in the family, it is necessary to disinfect key links in time to prevent the spread among family members.

There are several general methods of disinfection in the home:

Air disinfection - the easiest way to open the window for ventilation can be used, open the window for 10 to 30 minutes each time, so that the air in the empty stall can circulate, so that germs can be discharged outside.

Disinfection of utensils – can be boiled with leftover food for 10 to 20 minutes or can be sterilized with 500mg l of available chlorine, or soaked with concentrated peracetic acid for half an hour to 1 hour. When disinfection of tableware, all dishes should be immersed in water, and the disinfection time should be counted from the time of boiling.

Hand disinfection – wash hands frequently with running water and soap, preferably with 1210 disinfectant containing 250-1000 mg l or iodophor with 250-1000 mg l of available iodine or with an approved commercially available hand sanitizer before eating, after using the toilet, and after contact with contaminated items.

Clothes and towels, etc. should be boiled and disinfected for 10 to 20 minutes, or soaked and disinfected with peracetic acid for 1 hour, and only chemical soaking and disinfection methods can be used for some chemical fiber fabrics and satins.

Disinfection of computer keyboards, mobile phone remote controls – this part is the part that people tend to forget. With the popularization of computers, people are typing the keyboard almost every day, but they don't know that the keyboard is a gathering place of bacteria and viruses, and it has never been disinfected. For the sake of your health and the health of your family, don't forget about it!

If the density of the disinfectant solution is 1 g ml, then:

1000x45% 15% = 3000 (g) The volume of the solution for 3000 g is 3000 ml.

3000 1000 2000 (ml).

A: Add 2000 ml of water.